There are two parts. The winter affects the story for the army because during the winter people don't want to work because it's so cold. The lack of food and there is barely any meat. Lastly the Revolutionary Era. Curzon is effected by this because he is still a runaway slave. He could be found by someone and given back to his owner. (Also Isabel but we don't know where Isabel is.) Curzon could be hanged or another punishment if he was found.